The invention relates to the field of painting decoration equipment, and discloses a painting device. The painting device comprises a supporting frame and a base, a painting opening is formed in the front end of the supporting frame, an electric air pump, an air conveying pipe and a brush rod are arranged in the supporting frame, the electric air pump comprises an air inlet and an air outlet, oneend of the air conveying pipe is connected with the air outlet of the electric air pump, a piston is arranged in the air conveying pipe, a transmission mechanism is arranged between one end of the brush rod and the piston, a brush head is arranged at the other end of the brush rod, a first rack, a first gear, a second rack and a fixing part capable of clamping a workpiece are further included, thepiston is provided with a swing rod, an opening is formed in the air conveying pipe, the swing rod penetrates the opening and is connected with the first rack, the first rack and the second rack areengaged with the first gear, a first wedge face is arranged at one end of the second rack, and the lower end of the fixing part is provided with a second wedge face matched with the second rack. According to the scheme, a workpiece can move up and down while the brush head rotates for dust removal, and the comprehensive thorough dust removal effect on the workpiece surface can be achieved.